Abstract
La0.7Sr0.3MnO3 (abbreviated as LSMO) nanostructures were fabricated by a simple electrospinning using a solution that contained poly(vinylpyrrolidone) (PVP), lanthanum, strontium and manganese nitrates. The LSMO nanostructures were successfully obtained from calcination of the as-spun LSMO/PVP composite nanofibers at 500–900 °C in air for 7 h. The as-spun and calcined LSMO/PVP composite nanofibers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Analysis of phase composition by XRD revealed that all the calcined samples have a single rhombohedral LSMO phase. The SEM results showed that the crystal structure and morphology of the LSMO nanofibers were affected by the calcination temperature. Crystallite size of the nanoparticles contained in nanofibers increased with an increase in calcination temperature. The specific saturation magnetization (M s ) values were obtained to be 1.23, 28.61, and 40.52 emu/g at 10 kOe for the LSMO samples calcined respectively at 500, 700, and 900 °C. It is found that the increase of the tendency of M s is consistent with the enhancement of crystallinity, and the values of M s for the calcined LSMO samples were observed to increase with increasing crystallite size. This increase in M s for the calcined LSMO samples with increasing crystallite size may be explained by considering a magnetic domain of the samples.
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Acknowledgements
The authors would like to thank the Department of Physics, Faculty of Science, Ubon Ratchathani University for providing XRD facility; Departments of Chemistry Faculty of Science, Khon Kaen University for providing VSM; and TMEC (NSTDA) for FE-SEM facilities. We would like to thank Prof. Supapan Seraphin and the University of Arizona for providing TEM facilities. R.Y. would like to thank the Commission on Higher Education, Thailand, for supporting by grant fund under the program Strategic Scholarships for Frontier Research Network for the Join Ph.D. Program Thai Doctoral degree for this research. This work is partially supported by the National Nanotechnology Center (NANOTEC), NSTDA, Ministry of Science and Technology, Thailand, through its Program of Center of Excellence.
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Yensano, R., Pinitsoontorn, S., Amornkitbamrung, V. et al. Fabrication and Magnetic Properties of Electrospun La0.7Sr0.3MnO3 Nanostructures. J Supercond Nov Magn 27, 1553–1560 (2014). https://doi.org/10.1007/s10948-013-2474-z
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DOI: https://doi.org/10.1007/s10948-013-2474-z